WASHINGTON — A Democratic official says support for gay marriage is set to be included in the official party platform adopted at this summer's convention.

The Democrats' platform drafting committee voted to include language backing same-sex unions at a meeting in Minneapolis over the weekend. Democratic delegates will formally approve the platform during the convention, which will be held in early September in Charlotte, N.C.

The push by several high-profile Democrats to include support for gay marriage in the party platform gained momentum after President Barack Obama voiced his personal support for same-sex unions earlier this year.